Closure for openings in boiler-headers



T. E. MURRAY;

CLOSURE FOR OPENINGS IN BOILER HEADERS.

APPLICATION FILED DEC. 16, 19!.9.

1 J 3 5O 8 3g Patented Aug 24, 1920.

L Jmvawtoz "mam UNITED STATES THOMAS E. MURRAY, OF BROOKLYN, NEW YORK.

CLOSURE FOR OPENINGS IN BOILER-HEADERS.

Application filed December 16, 1919.

To all whom it may concern Be it known that I, THOMAS E. MURRAY, a citizen of the United States, residing at Brooklyn, in the county of Kings and State of New York, have invented a certain new and useful Improvement in Closures for Openings in Boiler-Headers, of which the following is a specification.

The invention is a closure for openings in a boiler header, which can be made from sheet metal, easily applied and easily removed when access is desired to the inte rior of the header. The invention consists in the construction more particularly set forth in the claims.

In the accompanying drawing- Figure l is a longitudinal section of a boiler header, showing my closure in place. Fig. 2 is a front elevation taken in the direc tion of the arrow in Fig. 1.

Similar letters of reference indicate like parts.

A is a tubular header for a water tube boiler, to which one of the circulation tubes C is here shown butt-welded? On the front side of the header is integrally formed a tubular projection D having on its outer edge an inwardly turned flange E. To close the opening surrounded b said flange E, I provide a circular plate here having its central portion G concavo-convex surrounded by a flat rim I-I. Said plate is preferably struck up from sheet metal, and placed in projection D with its rim H in contact with the inner side of flange E, to which it is electrically sealed. Said seal is convenientl made from the outside by an arc pencll carried around the outer edge I of the joint between said rib and said flange. The plate F is placed with its convexity in- Specification of Letters Patent.

Patented Aug. 24, 1920.

Serial No. 345,171.

ward, as shown, and is introduced into the header before the ends thereof are closed; or into a header section, as J, when the header is built up of a series of said sections, as K, J, L, welded together in succession at joints indicated at N, 0.

Then it is desired to obtain access to the interior of the header, the seal can be easily broken and the plate driven inward by a hammer blow delivered upon it from the outside. The plate will then fall to the bottom of the header, wherefrom it can be removed. To close the opening again, a new plate F may be inserted and sealed to the flange E in the manner already described.

The object of making the plate F concavoconvex and placing it with its convexity inward is to increase its strength to resist the internal pressure in the header.

I claim:

1. A header for steam boilers having a lateral tubular projection with an inwardly turned flange on its outer edge, and a closure within said projection electrically sealed to said flange.

2. A tubular header for steam boilers.

having a lateral tubular projection with an inwardly turned flange on its outer edge, and a closure plate within said projection, the said plate having a concavo-convex central portion and an encircling flat rim, the said rim being electrically sealed to the inner surface of said flange.

In testimony whereof I have affixed my signature in presence of two witnesses.

THOMAS E. MURRAY.

Witnesses:

GERTRUDE T. PORTER, MAY T. MCGARRY. 

